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Installation manual
R32 Split series
2MXM68A2V1B
3MXM40A2V1B
3MXM52A2V1B
3MXM68A2V1B
4MXM68A2V1B
Installation manual
4MXM80A2V1B
English
R32 Split series
5MXM90A2V1B

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Table of Contents
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Summarization of Contents

About the documentation
1.1 About this document
Explains the purpose and content of the installation manual.
Specific installer safety instructions
Unit installation safety
Safety precautions related to unit installation.
Installation site safety
Safety precautions for the installation location.
Piping installation safety
Safety precautions for refrigerant piping.
Charging refrigerant safety
Safety precautions for refrigerant charging.
Electrical installation safety
Safety precautions for electrical connections.
About the box
3.1 Outdoor unit accessories
Details on accessories included with the outdoor unit.
Unit installation
4.1 Preparing the installation site
Steps to prepare the installation location for the outdoor unit.
4.1.1 Installation site requirements
Spacing and site considerations for outdoor unit installation.
4.2 Mounting the outdoor unit
Procedures for mounting the outdoor unit.
4.2.1 Installation structure
Steps for providing the installation structure.
4.2.2 Install the outdoor unit
Steps for physically installing the outdoor unit.
4.2.3 Provide drainage
Instructions for outdoor unit drainage.
Piping installation
5.1 Preparing refrigerant piping
Instructions for preparing the refrigerant piping system.
5.1.1 Refrigerant piping requirements
Requirements for refrigerant piping materials and diameters.
5.1.2 Refrigerant piping insulation
Guidelines for insulating refrigerant piping.
5.1.3 Refrigerant piping length and height
Specifications for refrigerant piping length and height.
5.2 Connecting the refrigerant piping
Procedures for connecting refrigerant piping.
5.2.1 Connections with reducers
How to connect units using reducers.
5.2.2 Connect piping to outdoor unit
Steps to connect refrigerant piping to the outdoor unit.
5.3 Checking the refrigerant piping
Procedures for checking refrigerant piping.
5.3.1 Check for leaks
Detailed steps for checking refrigerant piping for leaks.
5.3.2 Perform vacuum drying
Steps to perform vacuum drying of the system.
Charging refrigerant
6.1 About the refrigerant
General information about the refrigerant used.
6.2 Determine additional refrigerant
How to calculate the amount of additional refrigerant needed.
6.3 Determine complete recharge
How to determine the total refrigerant amount for recharge.
6.4 Charge additional refrigerant
Steps for charging additional refrigerant.
6.5 Fix refrigerant gases label
Instructions for filling and affixing the refrigerant gas label.
Electrical installation
7.1 Wiring component specifications
Details on standard wiring components.
7.2 Connect electrical wiring
Step-by-step guide to connecting electrical wiring to the outdoor unit.
Finishing the outdoor unit installation
8.1 Finish outdoor unit installation
Final steps to complete the outdoor unit installation.
Configuration
9.1 Standby electricity saving
Explanation of the standby electricity saving function.
9.1.1 Turn ON standby function
Steps to enable the standby electricity saving function.
9.2 Priority room function
Explanation of the priority room function.
9.2.1 Set priority room function
Steps to configure the priority room function.
9.3 Night quiet mode
Details on the night quiet mode.
9.3.1 Turn ON night quiet mode
Steps to activate the night quiet mode.
9.4 Heat mode lock
Explanation of the heat mode lock feature.
9.4.1 Turn ON heat mode lock
Steps to enable the heat mode lock.
9.5 Cool mode lock
Explanation of the cool mode lock feature.
9.5.1 Turn ON cool mode lock
Steps to enable the cool mode lock.
Commissioning
10.1 Checklist before commissioning
Checklist for pre-commissioning verification.
10.2 Checklist during commissioning
Checklist for verification during commissioning.
10.3 Trial operation and testing
Procedures for trial operation and testing.
10.3.1 Wiring error check
Information on the wiring error check function.
10.3.2 Perform test run
Steps to perform a test run.
10.4 Starting up outdoor unit
Steps for starting up the outdoor unit.
Maintenance and service
Maintenance and inspection checklist
Checklist for routine maintenance and inspections.
Disposal
Disposal procedures
Guidelines for proper disposal of the unit.
Technical data
13.1 Wiring diagram
Location and legend for the wiring diagram.
13.2 Piping diagram: Outdoor unit
Diagram of the outdoor unit piping layout.

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